Adjusting means for textile drawing mechanisms



2 Sheets-Sheet 1 /nven/or:

Erwin 34u50,

wam sshaw Jan. 14, 1958 E. DAuscl-l ADJUSTING MEANS FOR TEXTILE DRAWINGMECHANISMS Filed Nw.A 1e.' 1954 lv NAAM@ om bw. kw N m.

E. DAUscH 2,819,497

ADJUSTING MEANS FOR TEXTILE DRAWING MECHANIsMs Jan. 14, 1958' 2Sheets-Sheet 2 Filed NOV. r16, 1954 mi uw www@ s .51 my,

.appended claims. .as to Tits construction and'its 'method fot openanon,to-

ADJUSTING MEANS FOR TEXTILE DRAWING MECHANISMS Erwin Dausch, Esslingen,Germany, assignor to S. K. F. Kugellagerfabriken,G. `m. b. H.,Schweinfurt, Germany Application November-.16, 1954,- Serial No.469,223, Claims priority, applicationGermany April 7, 1954 14 Claims.(Cl. 19--135) The present invention relates to textile drawing..mechanisms.

With conventional textile drawing mechanisms there are usually top rollscarrying arms each of which is,y provided with a plurality of individualtop roll carriers shiftable alongV the armso as to adjust the positionofthe top rolls. Each of these top roll carriers are, fixed in their.adjusted position independently. Thus, with the conventionalarrangement it is necessary forA thev operator to release each `of theshiftable carriers and to. then tix each. of these carriers in itsadjusted position, and these operationsare extremely inconvenient andrequire` a considerable amount of' time.

One of` the objects of the present invention isto overcome the abovedrawbacks -by providing a means-which enables all of theshiftablercarriers `to be fixed releasably in their-.adjusted positionwith one single operation so that the release of all of the shiftablecarriers land the xing thereof 4in an adjusted position requires averyshort time andvmay be carried out in an extremely simpleiway.

Another .object of the present` invention is to provide a means` of theabove type which` is of an exceedingly `simple construction.

A furthero'bject of the presentfxinvention `is to provide ameans-o'f theabovetypewhich requires `no special tools for` releasing the carriers`andffor fixing the same inrtheir adjusted position.

An additional object `of the present invention i'stopro vide a top rollscarrying arm with an extremely simple means for mounting and guiding thecarriers for `shifting movement along the arm.

Also, it is an object of the present invention to provide each top rollcarriers with a means' which automatically limitsthe movement of thetoproll away from the'carrier when the arm supporting the carrier is turnedupwardly away from the drawing plane to an inoperative position.

`With the above .objects in view `the `present invention mainly`consists .of adrawing `mechanism which includes a support means and atop rolls .carrying `arm carried by the support means `for `movement toand from `an operating position where the arm extends .over the drawingplane. A `plurality of toproll carriers are distributed along the arm,these carriers respectively `having top walls which overlie .each otherin :all lpositions of the ,carriers o n the arm. .A mountingand guidingmeans Ais rigid 4with the .arm and engages the carriersfpfor guiding theLsame for shifting movement :along `the arm. Finally, a means is carriedby the top rolls carrying arm and engages at least'oneofthe.carrier toptwalls for releasably `preventing :relative movement between these topwalls .so as to tix the positionof the `.carriers von `the arm after-adjustmentofethe carriers along the1arm.

Theynovel tfeatures which .arefconsidered .fas characteristic-for .theinvention `are set forth in particular in the .The A:invention itself,however, both gether with additional objects and advantage thereof, willnited rates Patent lCC be, best` understood. from, the.` followingldescription. of specific embodiments when. read in4 connection witl'itheaccompanying drawings, in which:` i

Fig. l. isa. partly diagrammatic andj partly', sectional, fragmentary`Side elevational View; ntf e.: drawing elianisna.. Constr-nnen. in.neeernenee withfthe" Present inv` vention; y

Fie is. e Seetinnnl View taken alena the..y line 2v2 Qfz. Fia; 1 in`the. dir'eetinn nf.- thef arrows;

Fia. 3i is` e. seetienal. fragmentary. vi. ,s` taken` along thelinet3--f3` of Fig. 1 inthedirection other. arrows;

Eig. 4 isA a fragmentary, part1ysectional,. side elevationall view ofadiiferent embodiment of a structune. constructed; inu accordance with:the. present. inventiom.

Fig. 5 is a fragmentary, partly. sectional, side. elevational; View ofa, third.` embodiment of a., structure constructed in accordance withthe present invention; and

Fig. 6 is a fragmentary, partly sectionahside elevational. view of stillanother embodiment if a structure constructed in accordance with thepresent"invention.`

Referring now to Figs. 1-3` which illustrate one-embodiment oftheinvention, a snppo'rtingframe IAQcar-res blocks 70, 71, andV 72 whichare shiftable` along the frame 10 in any lnown way so that thepositionsoffthesfe` blocks alongrthegdrawing planemay be adjusted, and any knownmeans is providedA vto tixtheiblocks' in their adjustedfpsition. Theblocks -7g respectively sixipporttheV rolls 11`13 for turning movement',as' is'evident from Fig. 1. Av rod 1 4 is rigidl with 'the'.` frame '10and 'carries a support 15 which has"dbwnvvardlydirected free p0rn-QnsSnnenndine the reel Mend. eleas'ebly 'drawn tewnrd eeen other by e Serewmeent t6 for' nnnathe Suppen `15 en the fed 14 elneent its ten eind' the.Support 15 teenies e Rivet ein .1t end extentie between the side Wallsof a top roll carrying arm 17., 'the pivotdpin 1.8 extending. throughSltable openings. in e eine walls ne. that the ann 17 is. fnrnnbl'earned mantienen 15er the Pivot pin 18- fIn enten te 'nn ann-.11 intheOperating. nennen shawn in High l this` ann- 17. annee ailocl; member1,9 `which extends. Aahctutlthe "1 and wheh han .a t0n Well`Provided-et? it? andere@ with n cylindrical surface portion eng ging. acylindricalsnrface portion ofthe top wall of ,11, a lshown Fig. l, so.that the locltmember 19 i waysupnortedfor lturning movement with respecttothe armpit?. "Lock 19u is previded .with en .enteneen la@ nanna`free-1y through en Opening in the ten Wel-.1 eine 17, andr .thisextension ,17912. is itself formed with an` fattening thrllgh WhiehnWnVY- leaf Spring 'I3 entends. as shewn .in Fig-fl, .this vSpring 73engaging the extension .192 and ,the-bottom face of `the top .wall ofthe arm 17 Sothat thefspring 73: urges the lock 19 to its lockingpositionyshowni inlig. 1. At its .bottom end the lock 1.9 isvprovide-d1.with a cross `member 191 which engages .a forward extensionV151 of the .support 15 to maintain the arm` 17 inthe'operating positionshown in Fig. l, and in .order .toreleasethe arm 'lit 'is only necessaryto turn lockt 1.9"ina clockwise direction, as viewed in Fig. 1, so ast'o vmove cross member 191 out of engagement .with extension 151.

The top rolls carrying arml is made. but of sheet metal and has asubstantially U-.shaped cross.sectionfthebottom ofthe ann 17 being`opened and thecliannelshape of the arm providing the latter with-a Vtopwall and a'pair of side walls. As was mentioned above these sidewallslat the rear endportion ott arm `17 extendabfout the topend .AS .isparticularly ennnrent .frein Fie?, the ann `17 .is

ptessedinwendly .along .itseiipeeite .eine .figesttqrrevidje the arm 17with inwardly extending pnjectons 171er;-

tending along the length of arm 17, and furthermore, between its topkand bottom edges each of the side walls of the arm 17 is provided withan elongated inwardly struck portion 172 having an upwardly directedfree edge, as shown in Fig. 2. The portions 171 and 172 extend alongalmost the entire length of the arm 17, as is apparent from Fig. 1. Inthe interior of the arm 17, the top free edges of the inwardly struckportions 172 and the bottom surfaces of the inwardly pressed projections171 provide a mounting and guiding means for mounting and guidingindividual top roll carriers, and as is apparent yfrom Figs. 1 and 2 theintermediate carrier 27 of the three top roll carriers shown in Fig. 1is itself of a substantially U-shapedcross section. As is apparent fromFig. 2 the carrier 27 is opened at its bottom and has its side wallsengaging the innersurfaces of the side walls of the arm 17. The topsurface of the carrier 27 is in slidable engagement with the bottominner surface of the inwardly pressed portions 171, and the bottom freeedges 272 of the carrier 27 are in slidable engagement with the top freeedges of the inwardly struck portions 172. In this way, the carrier 27is mounted within the arm 17 and the carrier 27 is shiftable alongportions 171 and 172 of arm 17 so that these portions guide the carrier27 for movement to a desired position along the arm 17.

A pair of rigid strips 75 are iixed respectively to the inner faces ofthe side walls of carrier 27 adjacent the rear end portion thereof,- andthese strips 75 extend Ifreely about the inwardly struck portions 172,as is apparent from Fig. 2. A pin 29 extends between and is iixed to thestrips 75, and a pressure arm 30 is pivotally carried by the pin 29. Acoil spring 24 engages the top surface of arm 30 and the bottom surfaceof the top wall of carrier 17 so that this coil spring 24 tends to turnthe arm 30 in a counterclockwise direction, as Viewed in Fig. 1. At its-free end portion the arm 30 is i'ixed to and carries a saddle 76 whichengages the shaft 78 of top roll 21, and a leaf spring 77 is fixed tosaddle 76 and engages shaft 78 to turnably connect the top roll 21 tothe saddle. A substantially L-shaped stop member 273 is lixed to andextends downwardly from the top wall 271 of carrier 27, and a secondL-shaped stop member 301 is fixed to and extends upwardly from the arm30, these stop members being inverted with respect to each other so thatthe stop member 273 is located in the path of movement of stop member301 when the arm 30 turns about pin 29 upon raising of the arm 17, as isapparent from Fig. 1. Thus, the stop member 301 will move intoengagement with the stop member 273 to limit the turning of thearm 30and top roll 21 away from carrier 27 during movement of the arm 17 toits inoperative position.

A forward carrier 26 is located ahead of carrier 27 and a rear carrier28 is located behind the carrier 27, and these carriers 26 and 28 havethe same cross section as the carrier 27. The carrier 26 has its bottomfree edges in engagement with the top free edges of inwardly struckportions 172, and the carrier 28 has its bottom free edges 282 inslidable engagement with the top free edges of inwardly struck portions172, and both of these carriers are in slidable engagement with theinwardly pressed portions 171, so that in this way the carriers 26 and23 are also shiftable along the arm 17. Fig. 3 clearly illustrates howthe carrier 26 is mounted and guided in this manner,.and the carrier 28is mounted and guided in a similar way. The stop members 263 and 283 ofthe carriers 26 and 28, respectively, are identical with stop member273, and the remainder of the structure for interconnecting the toprolls 20 and 22 with the carriers 26 and 28, respectively, is identicalwith the above described structure of carrier 27, and the elements ofthese structures are provided with the 1same members. The carriers 26and 28 are, however, different from carrier 27 in that the top walls ofcarriers 26 and 28 are considerably longer than the top wall of thecarrier 27. Thus, the top wall of carrier 26 includes an extension 264which extends over the carrier 27, and the top wall of the carrier 28includes an extension 284 which also extends over the carrier 27, sothat the top walls of the three carriers are in overlying engagementwith each other. The length of the extensions 264 and 284 is such thatthey remain in overlying engagement with each other and with the carrier27 beneath the screw 32 of Fig. 1 in all positions of the top rolls.Thus, when the top rolls are shifted the carriers 26 and 28 will moveand will cause the extensions 264 and 284 to shift with respect to eachother as well as with respect to 'the carrier 27 which may also beshifted. This screw 32 extends threadedly through a threaded opening inthe top wall of the arm 17, and the screw 32 is provided with a bottomenlarged end which engages the uppermost of the overlying top walls ofthe several carriers, the extension 264 in the example shown in Fig. l.The screw member 32 is provided in its top face with a suitable slot toreceive a screw driver, for example, and it is evident that by turningthe screw 32 downwardly against the top walls the latter are pressedtightly together so as to prevent shifting of the carriers, while atthesame time the screw 32 may be loosened to release the carriers -forshifting movement. In this way but a single quick operation is requiredto release the carriers and to tix the same.

Fig. 4 illustrates a second embodiment of the invention, and all of theparts shown in Fig. 4 which are identical with the corresponding partsof Figs. 1 3 are indicated with the same reference characters. The toprolls carrying arm 42 of Fig. 4 diiiers from arm 17 only in that the topwall of arm 42 is provided with a pair of upwardly extending portionscarrying a pivot pin 41 which is xed to these upwardly extendingportions, and the arm 42 is provided in its top wall with a cutoutthrough which a handle 43 freely extends, as shown in Fig. 4, thishandle 43 being rigidly fixed to a cam 40 which is eccentrically carriedby the pin 41 for turning movement to and from the position shown inFig. 4. In the position of the parts illustrated in Fig. 4, the cam 40presses the top wall 271 of carrier 27 and the extensions 264 and 284 ofcarriers 26 and 28, respectively, together so as to releasably fix thecarriers in an adjusted position along the arm 42. In order to releasethe carriers for shifting movement along the arm- 42, it is onlynecessary to turn the handle 43 upwardly so as to turn the cam 40 in acounterclockwise direction about the pin 41, and as is evident from Fig.4 this operation will release the carriers.

A third embodiment of the invention is illustrated in Fig. 5 which againindicates those parts identical with corresponding parts of the abovedescribed embodiments with the same reference characters. The top rollscarrying arm 541 of Fig. 5 is identical with the top roils carrying arm17 except that the arm 50 is formed in its top wall with an opening andis provided with a tubular member 5113 fixed to the top wall of arm 5t)and forming a downwardly extending extension of the opening in the topwall of the arm 50. A pin 51 is slidable in the tubular member 503 andextends upwardly beyond the arm 5t), as is evident from Fig. 5. At itsbottom end the pin 51 is provided with an enlarged portion 511 engagedby the bottom end of a coil spring 52 which extends about the tubularmember 503 and engages the bottom surface of the top wall of the armSil. Thus, the spring 52 urges the pin 51 downwardly so that the pin 51presses the top wall 271 of carrier 27 and the extensions 264 and 284together to maintain the three carriers in an adjusted position.

At its top free end portion above the arm 5t) the pin 51 is providedwith an annular groove 512 into which the tines 541 of the forked end ofa lever 54 extend. This lever 54 is bent, as shown in Fig. 5, so thatwhen the right free end of lever 54, as viewed in Fig. 5, is presseddownwardly the tines 541 will raise the pin 51 against the inuence ofthe spring 52 to release the #Pill S51 maybe raised until theenlargement :51lhthereof $953,365 the bottom :end 502 of the `tubularmember 503.

Fig. 6 illustrates -.a Afourth embodiment of the invention whereinelements identical with those of the abovedescribed embodiment areindicated with `the same reference characters. The top rolls carryingarm 60 of Fig. 6 `is provided along its .opposite upper side edges withinwardlypressed portions 601 `corresponding to the inwardly pressedportions 171, and furthermore, :the side walls of the` arm 60 are formedwith inwardly struck portions 602 providing top `free guiding edges inthe same Way as the inwardly Struck portions 172 `described above.Between the `guides 601 and 602 an intermediate carrier 621s .shiftablyarranged in the same way as the carrier 27, `and in a similar way thiscarrier 62 is provided with .a stop member 623 corresponding in allrespects to the stop member 273. A rear carrier 63 is provided with atop wall which includes an extension 634 extending over the top `wall621 of the carrier 62, and Fig. 6 shows only v the extension 614 of thetop wall of a front carrier which `is not shown in Fig. 6 and whichcorresponds in all respects to the carrier 26 of Fig. 1. The extension614 is provided with a plurality of openings distributed along thelength thereof, the extension 634 is similarly provided with a pluralityof openings 68, and the top wall 621 `of vCarrier 62 also is providedwith a plurality of open- -ings 6,8. The openings 68 of the several topwalls are `spaced equally from each other so that the three carriers maybe. shifted to several positions where at least one of ths openings ofone of the top walls is in alignment with at least one of the openingsof the other top walls. A` pin 64,1 in theI form of a free end portionof a lever 64 ex- 't'llds through one of the groups of aligned openings68 in the manner shown in Fig. 6, all of the openings` 68 being of thesame diameter. The lever 64 is pivotally carried by a pin 65 extendingthrough an opening of lever 64 and' extending between and xed to thesidewalls of the arm 60. A spring 66 engages the lever 64 and the topwall of arm 60 to urge the lever 64 in a counterclockwise direction, asviewed in Fig. 6, to the position shown in Fig. 6, where the pin 641extends through a group of aligned, openings 68 and prevents shiftingmovement of the carriers. A pin 67 is slidable through an opening in thetop wall of arm 60, and the bottom end portion 671 of the pin 67 engagesthe lever 64 in the manner shown in Fig. 6. Thus, in order to releasethe `carriers of Fig. 6 for shifting movement along the arm 60 it isonly necessary for the operator to depress pin 67 so as. to turn thelever 64 in a clockwise direction, as viewed in Fig. 6, about pin 65 andagainst the iniluence of the spring 66, so as to raise the free endportion 641 of lever 64 out ofv the opening 68 to release the carriersfor shifting movement to a position where a different group. of openings68 are aligned beneath the free end portion 6'41 so that when the pin 67is released the spring 66T may move the pin-shaped portion 641 of lever64 through this group of aligned openings 68 to again lock the carriersin their adjusted position.

The top right end portion of Fig. l shows` a leaf spring fxedto theunderside of the top wall of arm 17 and having a curved right free endportion, as viewed in Fig; 1, which is adapted to enter a recess insupport 15 shown adjacent the upper right portion of support. 15 so asto releasably maintain the arm 17 in its inoperative position away fromthe drawing plane.

It will be understood that each of the elements described above, or twoor more together, may also find a useful application in other types ofdrawing mechanismsY diering from the types described above.

While the invention has been illustrated and described as embodiedinadjustable drawing mechanisms,l it is not intended to be limited; tothe details shown, since various modiicationsand structural changes. maybeI made without departing` inY any way from the spirit. of the presentinvention.. p.

Without-further analysis, `the foregoing twill so `fully :reveal thegist of the present invention that y'therscan by :applying Acurrent`knowledge readily `adaptlit for various applications without omittingfeatures that, from the standpoint `of prior art, fairly constituteessential `characteristics tof the Vgeneric Vor specic aspects of lthisinvention and, therefore, such adaptations should and yaretintended toVbe comprehended within the meaning and range of equivalence of thefollowing claims. v

What is claimed as new and desired to be secured by Letters Patent is:

1. In a drawing mechanism, in combination, support means; a top rollscarrying arm carried by said support means for movement to and from anoperating position where said arm extends over the drawing plane; a pairof top roll carriers spaced along said arm, one of said carriers havingan extension extending over and engaging the other 'of said carriers;mounting and guiding means rigid with said arm and engaging saidcarriers for guiding the same for shifting movement along said arm; andmeans carried by said arm and` engaging said extension for releasablypreventing relative movement between said extension and said othercarrier whereby after the position of said carriers along said arm isadjusted said lastmentioned` means releasably xes said carriers in theiradjusted position.

2. In a drawing mechanism, in combination, support means; a top rollscarrying arm carried by said support means for movement to and `from anoperating position where said arm extends over the drawing plane; aplurality of roll carriers distributed along said arm, all except one ofsaid carriers having extensions engaging each other and extending oversaid one carrier; mounting and guiding means rigid with said arm andengaging said carriers for guiding the same for shifting` movement alongsaid arm; and means carried by said arm engaging one of said extensionsfor releasably preventing relative movement between said extensions andsaid one carrier whereby after the position of said carriers along saidarm is adjusted said last-mentioned means releasably fixes said carriersin their adjusted position.

3. In a drawing mechanism, in combination, support means; a top rollscarrying arm carried by said support means for movement to and from anoperating position where saidarm extends over the drawing plane; aplurality of top roll carriers distributed along said arm, sa'idcarriers respectively having top walls which overlie each other in allpositions of said carriers on said arm; mountingand guiding means rigidwith said arm and engaging said carriers for guiding the same forshifting' movement along said arm; and means carried by said arm andengaging at least one of said top walls for releasably prevent'- ingrelative movement between said top walls so as to x the position of saidcarriers on said arm after'adjstment of said carriers. along said arm.

4. In a drawing mechanism, in combination, support means; a top rollsVcarrying arm carried by saidsup'port means for movement to and from anoperating' position where said arm extends over the drawing plane; aplural'- ity of top roll carriers distributed along said arm, saidcarriers respectively having top walls which overlie each other in allpositions of said carriers on said arm; mounting and guiding means rigidwith said arm andl engaging said carriers for guiding the same forshifting movement along said arm; and means carried by said arm forreleasably pressing said top walls into engagement with each other forreleasably preventing shifting of saidl car-- riers along said arm.

5. In a drawing mechanism, in combination, supportl means; a top rollscarrying'arm carried by saidlsuppor't means for movement to and from anoperating position wheresaid arm extends over the drawingplanega-lplurality of. top rollcarriers distributedalonghsaid arm,l saidcarriers. respectively having. top` Walls" which" overlie ecli.

top walls each being formed in its overlying portion with a plurality ofopenings distributed along said top 'wall and saidopenings beingaligned; mounting and guiding means rigid with said arm and engagingsaid carriers for guiding the same for shifting movement along said arm;a pin extending through a group of aligned openings of said top walls,respectively, to prevent shifting of said top walls with respect to eachother; and manually operable means engaging said pin for moving the sameout of said openings to release said carriers for shifting movement toanother adjusted position where another group of openings of said topwalls are in alignment to receive said pin and thus maintain thecarriers in their adjusted position.

6. In a drawing mechanism, in combination, support means; a top rollscarryingarm carried by said support means for movement to and from anoperating position where said arrn extends over the drawing plane; aplurality of top roll carriers distributed along said arm, said carriersrespectively having top walls which overlie each other in all positionsof said carriers on said arm; mounting and guiding means rigid with saidarm and engaging said carriers for guiding the same for shiftingmovement along said arm; and screw' means threadedly carried by said armand engaging the uppermost of said top walls, whereby said screw meansmay be turned to press said top walls together so as to prevent shiftingof said carriers and to release said top walls to free said carriers forshifting movement.

7. In a drawing mechanism, in combination, support means; a top rollscarrying arm carried by said support means for movement to 'and from anoperating position where said arm extends over the drawing plane; aplurality of top roll carriers distributed along said arm, said carriersrespectively having top walls which overlie each other in all positionsof said carriers on said arm; mounting and guiding means rigid with saidarm and engaging said carriers for guiding the same for shiftingmovement along said arm; and cam means turnably carried by said arm,engaging the uppermost of said top walls, and being turnable between alocking position where said cam means presses said top walls together toprevent shifting of said carriers and a release position freeing saidcarriers for movement with respect to each other along said arm.

8. In a drawing mechanism, in combination, support means; a top rollscarrying arm carried by said support means for movement to and from anoperating position where said arm extends over the drawing plane; aplurality of top roll carriers distributed along said arm, said carriersrespectively having top walls which overlie each other in all positionsof said carriers on said arm; mounting and guiding means rigid with saidarm and engaging said carriers for guiding the same for shiftingmovement along said arm; a pin carried by said arm for movement into andout of engagement with one of said top walls; spring means engaging saidpin and urging the same into engagement with said one top wall forpressing said top walls together so as to prevent shifting movement ofsaid carriers with respect to each other; and manually operable meansengaging said pin for moving the same against the iniluence of saidspring means away from said one top wall to release said carriers forshifting movement with respect to each other along said arm.

9. In a drawing mechanism, in combination, an elongated top rollscarrying arm; support means supporting said arm for movement to and froman operating position where said arm extends over the drawing plane;three top roll carriers distributed along said arm with one of saidcarriers located between the otherttwo, the latter two carriersr havingtop Walls extending over and along said one carrier and overlying eachother and said one carrier; mounting and guiding means rigid with saidarm for mountingsaid carriers thereon and for guiding said carriers forshifting movement along said arm; and means carried by said arm oversaid one carrier and engaging at least the uppermost of said top wallsfor releasably preventing movement of said top walls with respect toeach other.

10. In a drawing mechanism, in combination, an elongated top rollscarrying arm; support means supporting said arm for movement to and froman operating position where said arm extends over the drawing plane;three top roll carriers distributed along said arm with one of saidcarriers located between the other two, the latter two carriers havingtop walls extending over and along said one carrier and overlying eachother and said one carrier; mounting and guiding means rigid with saidarm for mounting said carriers thereon and for guiding said carriers forshifting movement along said arm; and a screw member threadedly carriedby said arm over said one carrier and engaging the uppermost of said topwalls for releasably pressing said top walls against each other to pre-Vent movement of said top walls with respect to each other.

1l. ln a drawing mechanism, in combination, an elongated top rollscarrying arm; support means supporting said arm for movement to and froman operating position where said arm extends over the drawing plane;three top roll carriers distributed along said arm with one of saidcarriers located between the other two, the latter two carriers havingtop walls extending over and along said one carrier and overlying eachother and said one carrier; mounting and guiding means rigid with saidarm vfor mounting said carriers thereon and for guiding said carriersfor shifting movement along said arm; a cam turnably carried by said armover said one carrier and engaging the uppermost of said top walls forreleasably pressing said top walls against each other to preventmovement of said top walls with respect to each other; anda handle fixedto said cam for manually turning the same.

12. In a drawing mechanism, in combination, an elongated top rollscarrying arm; support means supporting said arm for movement to and froman operating position where said arm extends over the drawing plane;three top roll carriers distributed along said arm with one of saidcarriers located between the other two, the latter two carriers havingtop Walls extending over and along said one carrier and overlying eachother and said one carrier; mounting and guiding means rigid with saidarm for mounting said carriers thereon and for guiding said carriers forshifting movement along said arm; a pin over said one carrier extendingslidably through said arm, engaging the uppermost of said top walls, andhaving a free end portion extending outwardly beyond said arm; springmeans engaging said pin for urging the latter into engagement with saiduppermost top wall so as to releasably prevent shifting of said carrierswith respect to each other; and a handle engaging said free end portionof said pin for enabling the operator to move said pin against theinluence of said spring away from said uppermost top wall to releasesaid carriers for independent shifting movement along said arm.

13. In a drawing mechanism, in combination, an elongated top rollscarrying arm; support means supporting said arm for movement to and froman operating position where said arm extends over the drawing plane;three top roll carriers distributed along said arm with one of saidcarriers located between the other two, the latter two carriers havingtop walls extending over and along said one carrier and overlying eachother and said one carrier, each of said top walls being formed with aplurality of openings distributed along said arm, and the openings ofsaid top walls being in alignment with each other; mounting and guidingmeans rigid with said arm for mounting said carriers thereon and forguiding said carriers for shifting movement along said arm;-a lever turnably carried by said arm and having a free end portion extending throughone group of aligned openings to pre vent shifting movement of saidcarriers along said arm; spring means urging said lever to a positionwhere said free end portion thereof extends through said alignedopenings; and manually operable means carried by said arm and engagingsaid lever for turning the latter against the iniluence of said springmeans to a position where said free end portion is out of said openingsand said carriers are thus released for shifting movement along saidarm.

14. In a drawing mechanism, in combination, an elongated top rollscarrying arm; support means supporting said arm for movement to and froman operating position where said arm extends over the drawing plane;three top roll carriers distributed along said arm with one of saidcarriers located between the other two, the latter two carriers havingextensions, respectively, extending over and along said one carrier andoverlying each other and said one carrier; mounting and guiding meansrigid with said arm for mounting said carriers thereon and for guidingsaid carriers for shifting movement along said arm; and a singlereleasable fixing means carried by said 10 arm over said one carrier andengaging at least the uppermost of said extensions for releasablypreventing movement of said carriers with respect to each other, saidtixing means extending through said arm to the exterior thereof so as tobe accessible to the operator.

References Cited in the file of this patent UNITED STATES PATENTS2,353,338 Hess July 11, 1944 2,508,964 Naegeli May 23, 1950 2,601,371Cotchett June 24, 1952 2,624,077 Winslow Ian. 6, 1953 2,635,299Abernethy Apr. 21, 1953 2,675,587 Raible Apr. 20, 1954 2,694,230 DauschNov. 16, 1954 2,758,340 Anderson Aug. 14, 1956 FOREIGN PATENTS 205,736Germany Jan. 12, 1909 505,388 Belgium Sept. 15, 1951

